Hey guys I am buying this odonil from past one year , I love the fragrance it actually lit up you mood by making your surroundings smell fresh and free of bad Odour , it's easy to use you just need to open the covering and there you will find the cut symbol , tare it and hang in washroom are your living room and it will be free of bad odour , one packet of odonil usually last for a month and so , its not irritating like my previous products which I have used , odonil gives a plesent smell and freshen the air